For anyone who knows, My wife learned to graft larvae into JZ BZ cell cups ,placed in a hive for 10 days to allow bees to do their thing.Afterwhich each cup is placed into a Nucs without a queen until it hatches and then has the brood flight . My question what is this system called ? The folks that taught her have been in the bee business for generations . This is the way they have always done it.